Early-est:     Northern Sumatra, Indonesia    2026.10.03-23:37:34.55    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.2* [83]    Mwp: 6.4X [1]    Mwpd: 6.4Xinv [1] Region: Northern Sumatra, Indonesia Origin Time: 2026.10.03-23:37:34.55 UTC Hypocenter: lat: 4.69°  lon: 95.20°  [+/-16km]    depth: 52km  [+/-35km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 151   usedPhases: 117 minDist: 7.4°   maxDist: 159.9°   AzGap: 48°   2ndAzGap: 63°   atten: -0.96 [+/-0.28] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 16km   azMaxHorUnc: 47° 68%ConfEllipsoid:   semiMajorAxisLength: 37km   majorAxisAzimuth: 38°   majorAxisPlunge: 72°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 276°   intermediateAxisPlunge: 10°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [79]    Td: -s [0]    Td*T50Ex: - [0]    To: 31.5s [74] Closest plate boundaries:    Sunda - Burma [continental transform fault]: distance: ~100km    Burma / India [subduction zone]: distance: ~240km Subduction geometry:    Zone: Sumatra-Java: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9 Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (240km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        52km        52km        52km Slab depth at epicenter:        n/a        -        - Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 347°   dip: 18°   rake: 134° Nodal Plane 2: strike: 122°   dip: 77°   rake: 77° Quality: azimuthalGap: -1°   stationPolarityCount: 86   misfitWeightCount: 14.8   misfit: 0.13   stationDistributionRatio: 0.43   meanDistP: 41.7   meanDistT: 34.8   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 13°   dip: 64°   rake: -177° Nodal Plane 2: strike: 282°   dip: 88°   rake: -26° Quality: azimuthalGap: 66°   stationPolarityCount: 86   misfit: 0.14   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 28.83   fracAcc30degPref: 0.66   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1791070654696
Event info last updated: 2026.10.04-00:36:01 UTC
Event first association/location: 2026.10.03-23:45:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA